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Chicago Lakefront 50/50

Join us on 10/31/2020

Chicago Lakefront 50/50 Race Description

...Fastest 50-mile race times for any race in the U.S. (2017) for both men and women. - Ultrarunning Magazine, February 2018


Northside Location. The Start/Finish Area is located at the Foster Avenue Beach House, 5200 N. Lake Shore Drive, Chicago, IL 60640.

If you are entering Lincoln Park at Foster Avenue, from northbound Lake Shore Drive or Foster Avenue, look for our tent as soon as you enter the Park, on the north side of Foster Drive, east of the Foster Beach Parking Lot.

If you are entering Lincoln Park from southbound Lake Shore Drive at Lawrence, Wilson or Montrose Avenues, turn left at Simonds Drive, and go north. Simonds merges into Foster Drive. Take Foster Drive as far east as you can go!


50M:  6:30 AM (11-hour time limit)
50K:  8:30 AM

Early Start Option:

Early starts are available to any runner who wants to do so but you will not officially be in the competition (overall or age group). 

The way it works is to see Pat Onines (Co-Race Director) first on race day.  He will add you to the early start list.  He will also mark the bottom of your bib # with an “ES”.  You may then start whenever you wish and time yourself.  You’ll be responsible to know the course especially where the turn around is. 

When you finish, you’ll get a medal and a “Finished” in the official results with no time.  Be sure to let the finish line crew know you were an early starter to avoid any confusion with those being timed.  They will take the bottom of your bib # and give it to Pat as evidence of your finish. 

Please remember that early starters or those that finish after the race time limit will have a “Finished” in the results but will not receive a position or a time.


  • Consists of 4 out-and-back segments for the 50m and three for the 50k.
  • The races follow the Lakefront running path.
  • Mostly asphalt with some concrete sections.
  • One of the flattest 50k and 50 mile courses in North America.
  • The current 50 mi. world record was set on Chicago's lakefront in 1984.

Recognition for Individual and Course Record Performances:

If you are planning to set a record at this Event that you want to be recognized by USATF, you must contact us as early as possible before registering for the Event to inform us of your intentions, and to discuss the USATF's requirements for recognition of your achievement.


  • Belt buckles to 50M finishers 11 hours and under (no early starters).
  • Medals to all 50K finishers.
  • Overall male and female trophies.

Long Sleeve Tech Shirt:

To every paid participant.

Aid Stations:

Three; approximately every 2.5 miles. Amply stocked with water, Tailwind, cola, and a variety of food items.

Fees (Subject to change)


Through July 1 $55

Through July 2nd through October 29 $60

October 30 No Registration

October 31 $70 (Race Day Registration - Cash/Check Only)

50 M

Through July 1 $70

Through July 2nd through October 29 $80

October 30 No Registration

October 31 $90 (Race Day Registration - Cash/Check Only)

More Information:

e-mail: or
Chicago Ultra Marathon
20 Jonathan
Lake Zurich IL 60047
Phone: 847-648-8843

Volunteer Information:

Please send an e-mail to with your contact information, and include Chicago Lakefront 50/50 in your subject line.  Thank you!



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add race to calendar    Add to my calendar 2020-10-31 06:30:00 2020-10-31 06:30:00 America/Chicago Chicago Lakefront 50/50 Chicago, IL Jeff Fleitz

    Chicago Lakefront 50/50 Where & When

  • Location: Chicago, IL 60640
  • Race Date: 10/31/2020 06:30 (Saturday)
  • Categories:
    • 50k
    • 50

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